\documentclass{article}
\usepackage{tabularray}

\begin{document}
\begin{tblr}{
  hlines = {white},
  vlines = {white},
  cell{1,6}{odd} = {teal7},
  cell{1,6}{even} = {green7},
  cell{2,4}{1,4} = {red7},
  cell{3,5}{1,4} = {purple7},
  cell{2}{2} = {r=4,c=2}{c,azure7},
}
  Alpha   & Beta  & Gamma   & Delta   \\
  Epsilon & Zeta  & Eta     & Theta   \\
  Iota    & Kappa & Lambda  & Mu      \\
  Nu      & Xi    & Omicron & Pi      \\
  Rho     & Sigma & Tau     & Upsilon \\
  Phi     & Chi   & Psi     & Omega   \\
\end{tblr}
\end{document}
